ipsec-tools: update to 0.8.1

This patch updates ipsec-tools to version 0.8.1 and refreshes its
patches. It was released on Sourceforge on 2013-01-08.
Compile and run tested, no problems found.

Patch-by: Anton van Bohemen <avbohemen@ziggo.nl>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@35640 3c298f89-4303-0410-b956-a3cf2f4a3e73